Benthic foraminifera in the marginal Arctic Ocean
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PANGAEA
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| Autores principales: | , , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
| Publicado: |
PANGAEA
2004
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1867170456340004864 |
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| author | Wollenburg, Jutta Erika Knies, Jochen Mackensen, Andreas |
| author_facet | Wollenburg, Jutta Erika Knies, Jochen Mackensen, Andreas |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Analyses of benthic foraminifera in sediment cores taken at about 1000 m water depth at the Yermak Plateau and the Barents Sea slope, adjacent to the position of the ice-sheet edge during the Last Glacial Maximum, show that paleoproductivity was reduced to about a third of its present level during peak glacial stadials. These reduced values are still higher than values for modern, permanently ice-covered regions, suggesting that the core locations were at least partially ice-free even during stadials. Paleoproductivity at the core locations was higher than or equal to that of today during initial deglaciations and warm substages. Peak paleoproductivity occurred in samples with low-salinity surface waters as indicated by oxygen isotope values of planktonic foraminifera, and slightly after increased abundance of 'Atlantic species', suggesting that enhanced advection of warmer waters from the Atlantic supported the initial ice-sheet retreat. During the Holocene Climatic Optimum productivity was much less than at present on the Yermak Plateau, high at the Barents Sea site, perhaps because of increased advection of Atlantic water to the latter site and heavier ice coverage at the former. After this optimum, paleoproductivity at both sites was similar, with slightly lower values during cold periods such as the Little Ice Age. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_728235 |
| institution | PANGAEA |
| language | en |
| publishDate | 2004 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Benthic foraminifera in the marginal Arctic Ocean Wollenburg, Jutta Erika Knies, Jochen Mackensen, Andreas Amundsen Basin; ARK-IX/4; ARK-VIII/2; ARK-VIII/3; ARK-XIII/2; AWI_Paleo; Barents Sea; Gakkel Ridge, Arctic Ocean; Giant box corer; GKG; Gravity corer (Kiel type); KAL; Kasten corer; Lomonosov Ridge, Arctic Ocean; Makarov Basin; MIC; MiniCorer; Morris Jesup Rise; MSN; MUC; MultiCorer; Multiple opening/closing net; Nansen Basin; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS19/091; PS19/094; PS19/100; PS19/111; PS19/112; PS19/113; PS19/114; PS19/117; PS19/150; PS19/152; PS19/153; PS19/154; PS19/157; PS19/158; PS19/159; PS19/160; PS19/161; PS19/164; PS19/165; PS19/166; PS19/167; PS19/172; PS19/173; PS19/175; PS19/176; PS19/178; PS19/181; PS19/182; PS19/183; PS19/184; PS19/185; PS19/186; PS19/189; PS19/190; PS19/194; PS19/196; PS19/198; PS19/200; PS19/214; PS19/216; PS19/218; PS19/222; PS19/224; PS19/226; PS19/228; PS19/234; PS19/241; PS19/245; PS19/246; PS19/249; PS19/252; PS19 ARCTIC91; PS19 EPOS II; PS2125-1; PS2127-1; PS2129-2; PS2137-1; PS2138-1; PS2139-1; PS2140-1; PS2143-1; PS2157-3; PS2159-3; PS2160-3; PS2161-1; PS2163-1; PS2164-1; PS2165-5; PS2166-1; PS2167-3; PS2168-3; PS2170-4; PS2171-2; PS2172-3; PS2175-4; PS2176-2; PS2177-3; PS2178-4; PS2179-3; PS2180-1; PS2181-4; PS2182-4; PS2183-3; PS2184-3; PS2185-4; PS2186-3; PS2187-5; PS2190-5; PS2191-1; PS2192-2; PS2193-3; PS2198-4; PS2199-4; PS2200-4; PS2202-4; PS2204-3; PS2205-1; PS2206-4; PS2208-1; PS2210-3; PS2212-6; PS2213-4; PS2214-1; PS2215-1; PS2445-2; PS2446-2; PS2447-3; PS2448-3; PS27; PS27/019; PS27/020; PS27/024; PS27/025; PS2833-5; PS2833-7; PS2834-6; PS2834-7; PS2835-5; PS2836-9; PS2837-5; PS2837-6; PS2837-8; PS2837-9; PS2838-11; PS2838-6; PS2840-4; PS2840-5; PS44; PS44/060; PS44/062; PS44/063; PS44/064; PS44/065; PS44/067; PS44/069; SL; Svalbard; W Spitzbergen; Yermak Plateau Analyses of benthic foraminifera in sediment cores taken at about 1000 m water depth at the Yermak Plateau and the Barents Sea slope, adjacent to the position of the ice-sheet edge during the Last Glacial Maximum, show that paleoproductivity was reduced to about a third of its present level during peak glacial stadials. These reduced values are still higher than values for modern, permanently ice-covered regions, suggesting that the core locations were at least partially ice-free even during stadials. Paleoproductivity at the core locations was higher than or equal to that of today during initial deglaciations and warm substages. Peak paleoproductivity occurred in samples with low-salinity surface waters as indicated by oxygen isotope values of planktonic foraminifera, and slightly after increased abundance of 'Atlantic species', suggesting that enhanced advection of warmer waters from the Atlantic supported the initial ice-sheet retreat. During the Holocene Climatic Optimum productivity was much less than at present on the Yermak Plateau, high at the Barents Sea site, perhaps because of increased advection of Atlantic water to the latter site and heavier ice coverage at the former. After this optimum, paleoproductivity at both sites was similar, with slightly lower values during cold periods such as the Little Ice Age. |
| title | Benthic foraminifera in the marginal Arctic Ocean |
| topic | Amundsen Basin; ARK-IX/4; ARK-VIII/2; ARK-VIII/3; ARK-XIII/2; AWI_Paleo; Barents Sea; Gakkel Ridge, Arctic Ocean; Giant box corer; GKG; Gravity corer (Kiel type); KAL; Kasten corer; Lomonosov Ridge, Arctic Ocean; Makarov Basin; MIC; MiniCorer; Morris Jesup Rise; MSN; MUC; MultiCorer; Multiple opening/closing net; Nansen Basin; Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; PS19/091; PS19/094; PS19/100; PS19/111; PS19/112; PS19/113; PS19/114; PS19/117; PS19/150; PS19/152; PS19/153; PS19/154; PS19/157; PS19/158; PS19/159; PS19/160; PS19/161; PS19/164; PS19/165; PS19/166; PS19/167; PS19/172; PS19/173; PS19/175; PS19/176; PS19/178; PS19/181; PS19/182; PS19/183; PS19/184; PS19/185; PS19/186; PS19/189; PS19/190; PS19/194; PS19/196; PS19/198; PS19/200; PS19/214; PS19/216; PS19/218; PS19/222; PS19/224; PS19/226; PS19/228; PS19/234; PS19/241; PS19/245; PS19/246; PS19/249; PS19/252; PS19 ARCTIC91; PS19 EPOS II; PS2125-1; PS2127-1; PS2129-2; PS2137-1; PS2138-1; PS2139-1; PS2140-1; PS2143-1; PS2157-3; PS2159-3; PS2160-3; PS2161-1; PS2163-1; PS2164-1; PS2165-5; PS2166-1; PS2167-3; PS2168-3; PS2170-4; PS2171-2; PS2172-3; PS2175-4; PS2176-2; PS2177-3; PS2178-4; PS2179-3; PS2180-1; PS2181-4; PS2182-4; PS2183-3; PS2184-3; PS2185-4; PS2186-3; PS2187-5; PS2190-5; PS2191-1; PS2192-2; PS2193-3; PS2198-4; PS2199-4; PS2200-4; PS2202-4; PS2204-3; PS2205-1; PS2206-4; PS2208-1; PS2210-3; PS2212-6; PS2213-4; PS2214-1; PS2215-1; PS2445-2; PS2446-2; PS2447-3; PS2448-3; PS27; PS27/019; PS27/020; PS27/024; PS27/025; PS2833-5; PS2833-7; PS2834-6; PS2834-7; PS2835-5; PS2836-9; PS2837-5; PS2837-6; PS2837-8; PS2837-9; PS2838-11; PS2838-6; PS2840-4; PS2840-5; PS44; PS44/060; PS44/062; PS44/063; PS44/064; PS44/065; PS44/067; PS44/069; SL; Svalbard; W Spitzbergen; Yermak Plateau |
| url | https://doi.org/10.1594/PANGAEA.728235 |